Fathers Know Best (親父の逆襲 Oyaji no gyakushu?) is the 69th chapter of the manga it is also the seventh and final chapter of the Happosai Intro Arc. Ranma has a tough time dealing with Happosai since the Woman Repellant is now suffocating him. Soun and Genma decide that they have finally seen enough and are going to have to bring Happosai to justice.